A series of 4-aminomethylpyridazines and -pyridazin-3(2H)-ones (“diaza-benzylamines”), bearing alkylamino side chains in ortho position relative to the CH2NH2 unit, was synthesized by catalytic hydrogenation of the corresponding nitriles in strongly acidic medium. N-Benzyl protecting groups either at the pyridazinone ring nitrogen or at an exocyclic nitrogen were selectively removed hydrogenolytically or by treatment with a Lewis acid. The new compounds were tested in vitro for semicarbazide-sensitive amine oxidase (SSAO) inhibitory activity and 4-(aminomethyl)-N,N′-diethylpyridazine-3,5-diamine (22) was found to be the most active representative.
通过在强酸性介质中催化相应腈类的氢化反应,合成了一系列 4-
氨基甲基
哒嗪和
哒嗪-3(2H)-酮("重氮
苄胺"),其烷基
氨基侧链相对于 CH2NH2 单元位于正交位置。
哒嗪酮环氮或环外氮上的 N-苄基保护基团通过氢解或
路易斯酸处理被选择性地去除。对这些新化合物进行了半咔嗪敏感胺氧化酶(S
SAO)抑制活性的体外测试,结果发现 4-(
氨基甲基)-N,N′-
二乙基哒嗪-3,5-二胺(22)是活性最高的代表。